D. Walters

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An individual's responses to Goldberg's 30-item General Health Questionnaire are usually represented as a single score which provides a measure of the number of psychiatric symptoms reported. No account is taken of the nature of the symptoms. Factor analyses of the GHQ-30 were undertaken in ten randomly selected samples of 600 adults each, and also on 12(More)
Rats mated under normal lighting conditions of a 24 h day were transferred to a sound-proof room with period lengths (T) of 24 h (12 h light and 12 h dark, 12L:12D), or 22 h (11L:11D). During the first 15 d of pregnancy the rats were kept together in a large enclosure and the locomotor activity of the group was recorded. From day 15 they were kept(More)
Adult female rats received daily oral doses of delta 9-tetrahydrocannabinol (delta 9-THC), delta 8-THC and cannabidiol (CBD) throughout gestation and lactation. The offspring were sacrificed at various ages and tissue samples of cerebral cortex and striatum were assayed for alpha 1-adrenergic and D2-dopaminergic receptors, respectively. In addition,(More)
Adult female rats received daily oral doses of a crude marihuana extract (CME; equivalent to 20 mg/kg delta 9-THC) throughout gestation and lactation. The offspring were sacrificed at 10, 20, 40 or 60 days postpartum and tissue samples of cerebral cortex and striatum were dissected and assayed for alpha 1-adrenergic and D2-dopaminergic receptors,(More)
The effect of external potassium (K) and cesium (Cs) on the inwardly rectifying K channel ROMK2 (K(ir)1.1b) was studied in Xenopus oocytes. Elevating external K from 1 to 10 mM increased whole-cell outward conductance by a factor of 3.4 +/- 0.4 in 15 min and by a factor of 5.7 +/- 0.9 in 30 min (n = 22). Replacing external Na by Cs blocked inward(More)
6-Hydroxydopamine (6-OHDA) or 5,7-dihydroxytryptamine (5,7-DHT) was administered in the lateral cerebral ventricles of rats. These respective treatments caused reductions in norepinephrine (NE) and 5-hydroxytryptamine (5-HT) levels in the hypothalamus-thalamus-septum-midbrain (HTSM; 62% and 44%) and brainstem (57% and 26%), respectively. Catecholamine(More)
Twenty-eight-day-old rats exposed to the delta (delta) opioid receptor agonist SNC80 during the preweaning period exhibited a significant increase in the density and apparent dissociation constant of striatal dopamine D1-receptors. There were no significant effects on the binding characteristics of striatal D2-receptors or on D1- or D2-receptors in the(More)
To determine the role of dopamine D1 receptors in the locomotor activity of developing rats, male offspring were habituated to an animal activity monitor and were then injected with the dopamine D1 receptor antagonist, SCH 23390 (R(+)-7-chloro-8-hydroxy-3-methyl-1-phenyl- 2,3,4,5-tetrahydro-(1 H)-3-benzazepine), or vehicle and returned to the activity(More)
Previous studies used either racemic 3-(3-hydroxyphenyl)-N-n-propylpiperidine [(+/-)-3-PPP] or lower doses of the mixed dopamine (DA) D1/D2 agonist apomorphine (APO) to conclude that brain DA D2 autoreceptors are not behaviorally functional until 28 days of age. The purpose of this study was to provide behavioral evidence for functional D2 autoreceptors(More)
To determine the effects of chronic perinatal exposure to a kappa opioid agonist on the neurochemical and motor development of rat offspring, osmotic pumps containing trans-(+-)-3,4-dichloro-N-methyl-N-[2-(1-pyrrolidinyl)-cyclohexyl]- benzeneacetamide methane sulfonate (U-50,488H), 79 mg/ml, or vehicle were implanted into anesthetized pregnant female rats.(More)